Segmental dynamics of soccer instep kicking with the preferred and non-preferred leg |
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| Authors: | Hiroyuki Nunome Yasuo IkegamI Rumi Kozakai Tommy Apriantono Shinya Sano |
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| Institution: | 1. Research Centre of Health, Physical Fitness and Sports nunome@htc.nagoya-u.ac.jp;3. Research Centre of Health, Physical Fitness and Sports;4. Department of Epidemiology , National Institute of Longevity Sciences , Obu, Japan;5. Graduate School of Medicine;6. Graduate School of Human Informatics, Nagoya University , Nagoya |
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| Abstract: | Abstract Detailed time-series of the resultant joint moments and segmental interactions during soccer instep kicking were compared between the preferred and non-preferred kicking leg. The kicking motions of both legs were captured for five highly skilled players using a three-dimensional cinematographic technique at 200 Hz. The resultant joint moment (muscle moment) and moment due to segmental interactions (interaction moment) were computed using a two-link kinetic chain model composed of the thigh and lower leg (including shank and foot). The mechanical functioning of the muscle and interaction moments during kicking were clearly illustrated. Significantly greater ball velocity (32.1 vs. 27.1 m · s?1), shank angular velocity (39.4 vs. 31.8 rad · s?1) and final foot velocity (22.7 vs. 19.6 m · s?1) were observed for the preferred leg. The preferred leg showed a significantly greater knee muscle moment (129.9 N · m) than the non-preferred leg (93.5 N · m), while no substantial differences were found for the interaction moment between the two legs (79.3 vs. 55.7 N · m). These results indicate that the highly skilled soccer players achieved a well-coordinated inter-segmental motion for both the preferred and non-preferred leg. The faster leg swing observed for the preferred leg was most likely the result of the larger muscle moment. |
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| Keywords: | Asymetry of kicking resultant joint moment motion-dependent interaction moment proximal-distal sequence |
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